One of those members emailed 5 on Your Side Thursday and said she was allowed to cancel on the spot with no fees.

We checked it out, and it's true. Blast Fitness members who belong to the Maryland Heights location can immediately cancel their membership with just a phone call, no fees required. The number to call 1-800-622-6290.

The company also says any member at any Blast Fitness who is paying month-to-month can cancel their membership with 30 days notice.